The influence of sowing density on grain yield of maize in different classes of earliness
Aleksander Szmigiel
kszur@urk.edu.plAkademia Rolnicza w Krakowie (Poland)
Andrzej Oleksy
Akademia Rolnicza w Krakowie (Poland)
Abstract
The field experiments on the influence of sowing density on grain yield of maize were carried out on a very good wheat type complex soil. Three maize cultivars were used for the investigation: early Esslia (FAO-190), medium-early KLG 2210 (FAO-230) and medium-late Mona (FAO-270). The maize was sown in three densities: 90, 110 and 135 thousand grains per ha. Mineral treatment dosed: 70 kg P2O5, 90kg K2O and 80 kg N∙ha-1 was applied prior to sowing and 40kg N∙ha-1 as topdressing. The maize was hand sown with the interrows 70 cm wide. Weeds were controlled using the Azoprim herbicide after emergence. The plants were harvested in the last days of September every year. Plant density during harvest, for the average sowing density 90 thous; was 82.2 thous. pcs.∙ha-1, for sowing density 110 thous. was 100.0 thous. pcs.∙ha-1 and for 135 thous; density 113.8 thous. pcs./ha. The grain water content at harvest was on an average about 35%. It was much lower in 1999, in the early variety amounted 22.1% and in medium-late 29.9%. Under the experimental conditions, increasing sowing density caused higher grain yields ranging between 7.79 and 10.27 t per ha, depending on cultivar. Weather course in the respective years affected the maize grain yield to a lesser degree. Protein content in grain ranged between 9.42% and 11.48% depending on the studied factors.
Keywords:
cultivars, grain yield, maize, sowing densityReferences
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Authors
Andrzej OleksyAkademia Rolnicza w Krakowie Poland
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